PHP获取select值点击链接传到下一个页面

<div  class="price">
 <div class="clear"></div>
<dl>
<dt>选择合作服务站：</dt>
<dd>
<select name="zhan"><option >请务必选择收货地址</option>
<!--{loop $zhanlist $tt}-->

<option>{$tt[name]}-{$tt[address]}</option>
<!--{/loop}-->
</select>
</dd>
</dl>

</div>
 <a id="btn_Add" class="hidefocus" href="http://www.sdlhqc.com/
 create_partner_trade_by_buyer-PHP-UTF-8/index.php?sid={$product['price']}
 &itemid={$_GET['itemid']}&zhan" hidefocus="true">

 <dt>收货人地址：</dt>                     
 <dd>                         
 <span class="null-star">*</span>                         
 <input size="30" name="WIDreceive_address" value="<?php                          
 $t=$_POST['zhan'];                         
 echo iconv('GBK',"UTF-8","$t") ?>"" />                        
  <span>如：XX省XXX市XXX区XXX路XXX小区XXX栋XXX单元XXX号

<select name="zhan" onchange="location='目标url'+‘?chan='+this.value">

<foam method=post action='目标url'>
<select name="zhan" onchange="this.form.submit">
....
</select>
</form>